Index: wflow-py/UnitTests/TestBMI.py
===================================================================
diff -u -r25fd5288e8a5fc0dde3d411e5666ab7ab1e532d8 -r731a0561bb29f6d7557c583db5faaaf957581f9c
--- wflow-py/UnitTests/TestBMI.py	(.../TestBMI.py)	(revision 25fd5288e8a5fc0dde3d411e5666ab7ab1e532d8)
+++ wflow-py/UnitTests/TestBMI.py	(.../TestBMI.py)	(revision 731a0561bb29f6d7557c583db5faaaf957581f9c)
@@ -160,7 +160,8 @@
         bmiobj = bmi.wflowbmi_light()
         bmiobj.initialize('wflow_sceleton/wflow_sceleton.ini',loglevel=logging.DEBUG)
         et = bmiobj.get_end_time()
-        bmiobj.update(-1)
+        st = bmiobj.get_start_time()
+        bmiobj.update(et - st)
         bmiobj.finalize()
 
     def testbmirunnetcdf(self):